Joules might be a robot, but that doesn't mean he can't enjoy a calming tandem bike ride with his creator, Carl. He's not dead weight, either—he actually pedals, thanks to a PMG-132 motor.

There's trouble in paradise, however. Carl writes that Joules "does all of the pedaling," which sounds like the start of every sci-fi plot in which overworked robots rebel against their makers. Besides that little hiccup, this is a really cool project, and sort of cute in a weird nerdy way. [Endless Sphere Forums via Engadget]